Chevy Silverado
Check Engine Light
Saturn S-Series
Chevy Trailblazer

Your check engine light is on on a 1996 Saturn SC2 and you did a test on it and it said that your system is too rich P0172 How can you fix this problem?

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Wiki User
2006-11-19 20:04:29

This is caused by your PCM being unable to adapt enough to

correct a problem in the fuel/air mixture. This can be caused by

several things, not necessarily in this order. Catalyst plugged Bad

Powertrain Control Module Engine parts tolerance Fuel injector(s)

stuck open or leaking MAP sensor O2 sensor (upstream) Fuel pressure

regulator Wiring harness/connector problem

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